بررسی ویژگی های فیزیکی فیلم پلی لاکتیک اسید نشانگر شده با آنتوسیانین های استخراج شده از کلم قرمز و چغندر لبویی

نویسندگان
لیلا علیزاده 1
نفیسه جهانبخشیان 2
محمدحسین عزیزی 3
رضوان موسوی ندوشن 4
مرتضی احسانی 5
1 دانشگاه آزاد اسلامی واحد تهران شمال
2 استادیار، گروه علوم و صنایع غذایی، دانشگاه آزاد اسلامی واحد تهران شمال، تهران، ایران3 استادیار، گروه علوم و صنایع غذایی، دانشگاه آزاد اسلامی، واحد شهرکرد، شهرکرد، ایران
3 استاد تمام، گروه علوم و صنایع غذایی، دانشگاه تربیت مدرس، تهران، ایران
4 دانشیار، گروه علوم و صنایع غذایی، دانشگاه آزاد اسلامی واحد تهران شمال، تهران، ایران
5 استاد، پژوهشگاه پلیمر و پتروشیمی ایران، تهران، ایران
10.22034/FSCT.19.132.91
چکیده


در تحقیق حاضر ویژگی­های فیلم نشانگر پلی لاکتیک اسید و آنتوسیانین ­های استخراج شده از کلم قرمز و چغندر لبویی مورد بررسی قرار گرفت به طوری که نمونه­ های فیلم 1 (پلی لاکتیک اسید فاقد آنتوسیانین)، 2 (پلی لاکتیک اسید حاوی آنتوسیانین کلم قرمز)، 3 (پلی لاکتیک اسید حاوی آنتوسیانین چغندر لبویی) و 4 (پلی لاکتیک اسید حاوی آنتوسیانین چغندر لبویی و کلم قرمز) تهیه شدند و آزمون هایضخامت، حلالیت، خواص مکانیکی (میزان کشش پذیری، مقاومت به کشش، مدول الاستیک) و تغییرات مولفه های رنگیبر روی آنها صورت پذیرفت. نتایج نشان داد که اختلاف آماری معنی داری در ضخامت نمونه­های فیلم ملاحظه نشد(p≤0.05). بالاترین حلالیت متعلق به نمونه شاهد (فیلم 1) و پائین ترین میزان حلالیت متلعق به نمونه 4 بود.نتایج آزمون های مکانیکی نشان داد که بالاترین افزایش طول در شکست متعلق به نمونه های 3 و4 و پائین ترین افزایش طول در شکست متعلق به نمونه 1 بود (p≤0.05). همچنین پائین ترین مقاومت به کشش و مدول یانگ متعلق به نمونه 1 بود (p≤0.05). در تمامی نمونه­ های فیلم به جز نمونه 1، با افزایش pH (تاpH=14)،مولفه رنگیL*نمونه­ ها به طور معنی ­داری افزایش یافت (p≤0.05). همچنین در تمامی pHهای مورد بررسی، نمونه 1 دارای بالاترین مولفه رنگیL* و نمونه 3 دارای پائین ترین مولفه رنگیL* بود (p≤0.05). مولفه رنگیa* در نمونه 3، در pH=1-6، روند افزایشی و سپس تا pH=14 روند کاهشی داشت(p≤0.05). در نمونه­ های 2 و4 در pH=1-13، روند کاهشی و سپس تا pH=14 روند افزایشی ملاحظه شد(p≤0.05). در نمونه 3، تا pH=6، روند افزایشی و پس از آن تا pH=14 روند کاهشی ملاحظه شد(p≤0.05). در مولفه رنگی b‏* نمونه 2، ابتدا در pH=1-12، روند کاهشی و سپس تا pH=14 روند افزایشی ملاحظه شد (p≤0.05). مولفه رنگی b‏* نمونه­ 3 در pH=1-11، و در نمونه 4 در pH=1-12، روند کاهشی و مجدد برای هر دو نمونه تا pH=14 روند افزایشی نشان داد(p≤0.05). نمونه 4 به دلیل ویژگی های فیزیکی مناسب و تغییرات رنگی واضح تر در pH های مختلف به عنوان تیمار برتر معرفی شد.
کلیدواژه‌ها
فیلم هوشمند
پلی لاکتیک اسید
آنتوسیانین
چغندر لبویی
کلم قرمز

موضوعات

عنوان مقاله English

Physical properties investigation of polylactic acid marker film with anthocyanins extracted from red cabbage and beetroot

نویسندگان English

Leila Alizadeh 1
Nafiseh jahanbakhshian 2
Mohammad Hossein Azizi 3
Rezvan Mousavi nadushan 4
Morteza Ehsani 5
1 Islamic Azad University, North Tehran Branch, Tehran, Iran
2 Assistant Professor, Department of Food Science and Technology, Islamic Azad University, North Tehran Branch, Tehran, Iran Assistant Professor, Department of Food Science and Technology, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran
3 Professor, Department of Food Science and Technology, Tarbiat Modares University, Tehran, Iran
4 Associate Professor, Department of Food Science and Technology, Islamic Azad University, North Tehran Branch, Tehran, Iran
5 Professor, Iran Polymer and Petrochemical Research Institute, Tehran, Iran
چکیده English

In the present study, the properties of polylactic acid marker film combined with red cabbage and beet anthocyanins were investigated. There were four samples: 1 (polylactic acid without anthocyanins), 2 (polylactic acid containing red cabbage anthocyanins), 3 (polylactic acid containing beet anthocyanin) and 4 (polylactic acid containing beet anthocyanin and red cabbage). Thickness, solubility, mechanical properties and changes in color indices were analyzed. The results showed that there were no statistically significant differences in the thickness of the film samples (p> 0.05). The highest solubility belonged to the sample 1 and the minimum solubility was detected insample 4. The highest increase in elongation at break was seen in samples 3 and 4 and the lowest increase in elongation at break belonged to sample 1 (p≤0.05). In all the films except sample 1, by pH rise (up to pH = 14), L * factor increased significantly (p≤0.05). In all pH ranges, sample 1 had the highest L * and sample 3 had the lowest one (p≤0.05). a * indice in sample 3, at pH = 1-6, had an increasing trend and then decreased to pH = 14 (p≤0.05). In samples 2 and 4 at pH = 1-13, a decreasing trend was observed and then up to pH=14 an increasing trend was observed (p≤0.05). For b *in sample 2 there was a decline at pH = 1-12, then up to pH = 14, an increasing trend was detected (p≤0.05). The b * of sample 3 and 4 had a fall until pH=11 and 12 respectively following an increasing trend up to pH=14 (p≤0.05). The best sample was sample 4 due to suitable physical properties and clearer color changes at different pH.

کلیدواژه‌ها English

Smart film
Polylactic acid
Anthocyanin
Beetroot
Red cabbage
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